However, this is the only ballot I recall containing
non-ASCII characters, which could be the cause.

Ahhh, this is a typical cause of problems. So we have three chances:
1) fix software that interprets incoming mails
2) issue an alternate ballot where 'ë' in Raphaël is
simplified as 'e' (and we agree that this is the same
person as Raphaël)
3) do not accept DPLs with non-ASCI names. ;-))
Probably 2 is the esiest to implement solution for the moment
without discriminating anybody.
Kind regards
Andreas.
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